Kat Williams

Katt Williams is under investigation by the feds, and they're going after his ex-girlfriend in an attempt to get dirt on him ... TMZ has learned. Sources close to Katt's ex, former "Love & Hip Hop Hollywood" star Hazel-E, tell us ... IRS agents in street clothes showed up at her door a few days…

Katt Williams got pulled over in Malibu Tuesday evening by Sheriff's deputies investigating his security guard for tasing a random guy on Pacific Coast Highway, Law enforcement sources tell us the guy started kicking a car driven by Katt's assistant ... who was following Katt while he rode a…